Passivation · Process-engineered chemistry

UNIPASS-FE NON CHROMEIron Passivation – Non Chrome

Direct Cr⁶⁺ Replacement with Zero Equipment Change

120–200 h Salt SprayREACH CompliantEU ELVZero Cr⁶⁺

01 / Product brief

Direct Cr⁶⁺ Replacement with Zero Equipment Change

Chromium-free post-phosphate passivation sealer based on zirconium or organic sealant chemistry. Seals the phosphate crystal structure to achieve 120–200 hours salt spray performance without REACH or EU ELV restriction. Validated as a direct Cr⁶⁺ replacement for automotive pre-treatment lines.

Validated for direct Cr⁶⁺ replacement with zero equipment change — allows phosphating lines to achieve EU ELV compliance without capital investment in new rinse tanks or dosing systems. Zero Cr⁶⁺ in effluent immediately from switch date.

02 / Performance

Key process advantages

Product-specific outcomes for production quality, operating control and line performance.

01120–200 h Salt Spray

Drop-in Cr⁶⁺ replacement

Zero equipment modification for immediate REACH compliance

02REACH Compliant

120–200 hours salt spray

Strong corrosion performance without hexavalent chrome

03EU ELV

Zero Cr⁶⁺ in effluent

Full compliance from day of chemistry switch

03 / Technical data

Recommended operating window

Final operating conditions should be validated against substrate condition, line configuration and the specified finishing system.

[Zr/ORGANIC · REACH COMPLIANT]

Post-Iron Phosphate · Post-Zinc Phosphate · Automotive Pre-treatment

ParameterRecommended value
Operating Temp25–40°C
pH Range3–4
Salt Spray Performance120–200 h
ApplicationPost-Phosphate Sealer
ChemistryZr / Organic

Values are typical guidance. MacroCoats process engineers establish the final bath specification after line trials.

04 / Process position

Where it works in the line

Applied at Stage 6 (Passivate) — direct drop-in replacement for Cr⁶⁺ sealers delivering EU ELV compliance with no tank changes or line modifications.

  1. 01

    Degrease

    Process stage

  2. 02

    Rinse

    Process stage

  3. 03

    De-rust

    Process stage

  4. 04

    Rinse

    Process stage

  5. 05

    Condition

    Process stage

  6. 06

    Phosphate

    Process stage

  7. 07

    Passivate

    Applied at Stage 6 (Passivate) — direct drop-in replacement for Cr⁶⁺ sealers delivering EU ELV compliance with no tank changes or line modifications.

  8. 08

    Rinse

    Process stage

  9. 09

    Dry

    Process stage

05 / Applications

Specified for real production demands

Typical applications and substrate conditions for UNIPASS-FE NON CHROME.

Application 01

Post-phosphating on automotive components for EU-destined supply chains

  • Post-Iron Phosphate
Application 02

White goods pre-treatment lines transitioning from Cr⁶⁺ systems

  • Post-Zinc Phosphate
Application 03

Components where chrome-free certification is contractually required

  • Automotive Pre-treatment
Application 04

Any line seeking REACH compliance without capital investment

  • Post-Iron Phosphate

Technical support

Validate UNIPASS-FE NON CHROME on your line.

Share your substrate, current bath, throughput and finishing system. Our process team will recommend a practical trial window.

Get in Touch

Let's optimise your surface treatment process.

Whether you're scaling a phosphating line, addressing inconsistency across plants, or moving to chromium-free systems — our team is ready to engineer chemistry around your process.